Delone, Maurice Vincent, Jr., MoMM3c

 Service Photo   Service Details
5 kb
View Time Line
Last Rank
Petty Officer Third Class
Last Primary NEC
MO-0000-Motor Machinist/Oiler
Last Rating/NEC Group
Motor Machinistmate/Oiler
Primary Unit
1944-1945, MO-0000, USS Trigger (SS-237)
Service Years
1943 - 1945
MoMM - Motor Machinistmate/Oiler

 Last Photo   Personal Details 

Home State
Year of Birth
This Military Service Page was created/owned by Sheila Rae Myers, HM3 to remember Delone, Maurice Vincent, Jr., MoMM3c.

If you knew or served with this Sailor and have additional information or photos to support this Page, please leave a message for the Page Administrator(s) HERE.
Casualty Info
Home Town
Harrisburg, PA
Last Address
223 Maclay St
Harrisburg, PA

Casualty Date
Mar 28, 1945
Hostile-Body Not Recovered
Other Explosive Device
World War II
Location of Interment
Courts of the Missing at the Honolulu Memorial - Honolulu, Hawaii
Wall/Plot Coordinates
Court 5 (cenptaph)

 Official Badges 

 Unofficial Badges 

 Additional Information
Last Known Activity

USS Trigger (SS-237) began her 12th war patrol 11 March 1945. She made attacks on the 18th and the 20th. On 26 March she was ordered to join a "wolf pack" to attack Japanese shipping. She radioed a weather report that day and was never heard from again. She may have fallen victim to a Japanese air and ship attack, but her fate is unknown. Motor Machinist's Mate 3rd Class Delone was listed as missing in action and later declared dead 21 April 1946.

Service number: 2498294

Submarine war patrols:
USS Drum (SS-228) - 9th through 11th
USS Trigger (SS-237) - 11th and 12th

The information contained in this profile was compiled from various internet sources.
 Photo Album   (More...

USS Trigger (SS-237)
Start Year
End Year

USS Trigger (SS-237) was a Gato-class submarine, the first ship of the United States Navy to be named for the triggerfish.

Trigger's keel was laid down on 1 February 1941 at Mare Island, California, by the Mare Island Navy Yard. She was launched on 22 October 1941 (sponsored by Mrs. Walter N. Vernou), and commissioned on 30 January 1942, with Lieutenant Commander Jack H. Lewis (US Naval Academy Class of 1927) in command.

The submarine sailed for Hawaii on 22 May and reached Pearl Harbor the following week. She sortied for Midway Island with Task Group 7.2 (TG 7.2) on 29 May in anticipation of a Japanese attack on that island. Her station during the ensuing Battle of Midway was northeast of Midway, and she remained there without contacting any enemy shipping until she was ordered back to Pearl Harbor on 9 June.

Trigger (with new skipper Commander David R. Connole) stood out to sea on 11 March to begin her 12th war patrol and headed for the Nansei Shoto area. On 18 March, she attacked a convoy west of the islands, sinking the cargo ship Tsukushi Maru No.3 and damaging another. She reported the attack on 20 March, and the submarine was subsequently ordered to radio as many movements of the convoy as possible to help find a safe passage through a known mined area of the East China Sea. On 24 March, Trigger was ordered to begin patrolling west of the islands the next day, outside the 100 fathom curve, and to steer clear of restricted areas. On 26 March, she was ordered to join a wolf pack called "Earl's Eliminators" and to acknowledge receipt of the message. A weather report came from the submarine that day but no confirmation of her having received the message. The weather report was Trigger's last transmission. On 4 April, she was ordered to proceed to Midway, but she had not arrived by 1 May and was reported as presumed lost.

Postwar records indicate she torpedoed and sank the repair ship Odate on 27 March. The next day, Japanese planes and ships joined in a two-hour attack on a submarine heard by Silversides, Sea Dog (SS-401), Hackleback (SS-295), and Threadfin (SS-410) in adjacent areas. Threadfin was the only one of these submarines attacked that day, and she reported hearing many depth charges and several heavy explosions east of her after the attack on her ceased. Postwar Japanese records showed a Japanese aircraft detected and bombed a submarine on 28 March 1945. Kaibokan Mikura, CD-33, and CD-59 were then guided to the spot and delivered an intensive depth charging. After two hours, a large oil slick appeared.

Trigger was stricken from the Naval Vessel Register on 11 July 1945.

Trigger was immortalized and eulogized in Beach's 1952 book Submarine!.

Destroyer Escort (DE-1056, later FF-1056) USS Connole (FF-1056) was named in honor of Commander David R. Connole.

Trigger received 11 battle stars for World War II service and the Presidential Unit Citation for her fifth, sixth, and seventh war patrols. She is credited with sinking 18 ships (tied with Seawolf and Rasher for seventh on the list of confirmed sinkings by number of ships), totaling 86,552 tons (seventh on the list of confirmed sinkings by tonnage), according to the official JANAC accounting postwar.
My Participation in This Battle or Operation
From Year
To Year
Last Updated:
Jan 1, 2018
Personal Memories
My Photos From This Battle or Operation
No Available Photos

  3 Also There at This Battle:
  • Breaux, Calvin, SN, (1944-1946)
Copyright Inc 2003-2011